The PC version of GTA IV has not even been announced for release and is still in development so is not about to be released on a website we have no knowledge of. Have you got another version of GTA? There are other versions that are available on-line, the list are below, could it be one?

Soon after the ticket (made on the Take Two website) was published, Take Two caught on to it and deleted it. That screams cover up right there.